Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration
Between 2004 and 2007, 116 downstream migrant silver eels (Anguilla anguilla) were monitored at a hydropower plant on the Gave de Pau river in South-West France using radio and PIT telemetry. The objectives of the study were: (i) to determine the environmental conditions when eels arrived and passed...
Published in: | Knowledge and Management of Aquatic Ecosystems |
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Online Access: | http://oatao.univ-toulouse.fr/11275/ http://oatao.univ-toulouse.fr/11275/1/Travade_11275.pdf https://doi.org/10.1051/kmae/2010022 |
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ftunivtoulouseoa:oai:oatao.univ-toulouse.fr:11275 2023-05-15T13:27:09+02:00 Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration Travade, François Larinier, Michel Subra, Sébastien Gomes, Peggy De-Oliveira, Eric Centre National de la Recherche Scientifique - CNRS (FRANCE) EDF (FRANCE) Institut National Polytechnique de Toulouse - INPT (FRANCE) Université Toulouse III - Paul Sabatier - UPS (FRANCE) Office national de l'eau et des milieux aquatiques - ONEMA (FRANCE) 2010-09-27 application/pdf http://oatao.univ-toulouse.fr/11275/ http://oatao.univ-toulouse.fr/11275/1/Travade_11275.pdf https://doi.org/10.1051/kmae/2010022 en eng EDP Sciences http://oatao.univ-toulouse.fr/11275/1/Travade_11275.pdf HAL : hal-00967144 Travade, François and Larinier, Michel and Subra, Sébastien and Gomes, Peggy and De-Oliveira, Eric. Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration. (2010) Knowledge and Management of Aquatic Ecosystems (398). ISSN 1961-9502 info:eu-repo/semantics/openAccess Mécanique des fluides Hydrologie Silver eel Downstream migration Behaviour Hydroelectric plant Trashracks Radio-tracking Article PeerReviewed info:eu-repo/semantics/article 2010 ftunivtoulouseoa https://doi.org/10.1051/kmae/2010022 2019-08-29T11:19:30Z Between 2004 and 2007, 116 downstream migrant silver eels (Anguilla anguilla) were monitored at a hydropower plant on the Gave de Pau river in South-West France using radio and PIT telemetry. The objectives of the study were: (i) to determine the environmental conditions when eels arrived and passed the facility; (ii) to determine the rate of eel escapement (passage other than via the turbines); (iii) to describe the behaviour of eels faced with the intake structure and the permeability of the intake trashracks for the different sizes of eel; and (iv) to determine whether surface bypasses originally designed for salmon could be effective for eels. Five types of behaviour of silver eels in the forebay and at the plant intakes were identified. The study showed the key factor influencing both eel behaviour and the route taken through the plant was variation in river discharge. Escapement rate was related to eel length and the spill flow to river flow ratio, which could be described by a logistic regression model. The surface bypasses originally designed for salmon were found to aid downstream eel migration significantly. At velocities < 0.40 m·s−1, no eels, even the largest, for which the racks are a physical barrier, were found impinged on the trashracks. Article in Journal/Newspaper Anguilla anguilla OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse) Knowledge and Management of Aquatic Ecosystems 398 01 |
institution |
Open Polar |
collection |
OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse) |
op_collection_id |
ftunivtoulouseoa |
language |
English |
topic |
Mécanique des fluides Hydrologie Silver eel Downstream migration Behaviour Hydroelectric plant Trashracks Radio-tracking |
spellingShingle |
Mécanique des fluides Hydrologie Silver eel Downstream migration Behaviour Hydroelectric plant Trashracks Radio-tracking Travade, François Larinier, Michel Subra, Sébastien Gomes, Peggy De-Oliveira, Eric Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration |
topic_facet |
Mécanique des fluides Hydrologie Silver eel Downstream migration Behaviour Hydroelectric plant Trashracks Radio-tracking |
description |
Between 2004 and 2007, 116 downstream migrant silver eels (Anguilla anguilla) were monitored at a hydropower plant on the Gave de Pau river in South-West France using radio and PIT telemetry. The objectives of the study were: (i) to determine the environmental conditions when eels arrived and passed the facility; (ii) to determine the rate of eel escapement (passage other than via the turbines); (iii) to describe the behaviour of eels faced with the intake structure and the permeability of the intake trashracks for the different sizes of eel; and (iv) to determine whether surface bypasses originally designed for salmon could be effective for eels. Five types of behaviour of silver eels in the forebay and at the plant intakes were identified. The study showed the key factor influencing both eel behaviour and the route taken through the plant was variation in river discharge. Escapement rate was related to eel length and the spill flow to river flow ratio, which could be described by a logistic regression model. The surface bypasses originally designed for salmon were found to aid downstream eel migration significantly. At velocities < 0.40 m·s−1, no eels, even the largest, for which the racks are a physical barrier, were found impinged on the trashracks. |
author2 |
Centre National de la Recherche Scientifique - CNRS (FRANCE) EDF (FRANCE) Institut National Polytechnique de Toulouse - INPT (FRANCE) Université Toulouse III - Paul Sabatier - UPS (FRANCE) Office national de l'eau et des milieux aquatiques - ONEMA (FRANCE) |
format |
Article in Journal/Newspaper |
author |
Travade, François Larinier, Michel Subra, Sébastien Gomes, Peggy De-Oliveira, Eric |
author_facet |
Travade, François Larinier, Michel Subra, Sébastien Gomes, Peggy De-Oliveira, Eric |
author_sort |
Travade, François |
title |
Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration |
title_short |
Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration |
title_full |
Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration |
title_fullStr |
Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration |
title_full_unstemmed |
Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration |
title_sort |
behaviour and passage of european silver eels (anguilla anguilla) at a small hydropower plant during their downstream migration |
publisher |
EDP Sciences |
publishDate |
2010 |
url |
http://oatao.univ-toulouse.fr/11275/ http://oatao.univ-toulouse.fr/11275/1/Travade_11275.pdf https://doi.org/10.1051/kmae/2010022 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
http://oatao.univ-toulouse.fr/11275/1/Travade_11275.pdf HAL : hal-00967144 Travade, François and Larinier, Michel and Subra, Sébastien and Gomes, Peggy and De-Oliveira, Eric. Behaviour and passage of European silver eels (Anguilla anguilla) at a small hydropower plant during their downstream migration. (2010) Knowledge and Management of Aquatic Ecosystems (398). ISSN 1961-9502 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1051/kmae/2010022 |
container_title |
Knowledge and Management of Aquatic Ecosystems |
container_issue |
398 |
container_start_page |
01 |
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1766396774522552320 |